A light source includes: a first electrode using a reflective material; an EL layer; and a second electrode using a light-transmitting conductive film, in which light emitted from the EL layer is extracted from the second electrode; a selective reflection structure is provided on a light extraction side of the second electrode without an air layer interposed therebetween; and the selective reflection structure has a function of transmitting light of a particular polarization component and reflecting light of the other component.